The Nancroix valley which divides Peisey from the La Plagne side is of course now spanned by the Vanoise Express lift.
In winter, it's the site of some of France's best cross-country skiing.
In summer, there is serious walking to be done, for example exploring the gateway to the Vanoise National Park from the head of the valley at Rousel. The long-distance GR5 passes through, en route from Lake Geneva to the Med.
The classic one-day walk is the round trip to the Lac de La Plagne - a stiff 3 hour climb from the Rousel car park at 1550m. Leave early, take plenty of water, and aim for lunch at the entre-le-lac refuge 500m higher up:
|Looking back at Rousel, about one hour in|
|The gradient levels out slightly after a couple of hours|
|The Lac de La Plagne: an Alpine "tarn"|
|You can stay at the refuge for 38€ a night|